Accumulator



Jan. 1, 1952 I v. o. WILKERSON ACCUMULATOR 3 Sheets-Sheet 1 Filed NOV. 25, 1949 INVENTOR V. 0. WILKERSON AGENT 1952 v. O.W1LKERSON 2,

ACCUMULATOR Filed Nov. 25, 1949 3 Sheets-Sheet 2 HUNDREDS TEE -EOL- INVENTOR V. 0. WILKERSON Jan. 1, 1952 v. o. WILKERSON ACCUMULATOR 3 Sheds-Sheet 5 Filed Nov. 25, 1949 MEL o vhwb INVENTOR V OWILKERSON AGENT @256: E w 5.5828 E 9 512 wmu C528 55 N no Patented Jan. 1, 1$52 ACCUMULATOR Victor 0. Wilkerson, Vestal, N. Y; assignor to International 1 Business Machines Corporation, New York, N. Y a corporation. ofNew York Application November 25, 1949',S'erial No. 129,395

I 9 Claims.

This invention relatesgenerallyto record controlled accounting machines and more specifically to the accumulating mechanism thereof.

The principal object of the invention is toprovide an accumulator arrangement wherein the speed of the adding operation thereof-is increased over that of the prior art.

Another object of the invention is to provide" an accumulator arrangement wherein the speed atwhich a principal digital value is accumulated isincreased by breaking down the digital value into two components where one component is a multiple of a base divisor and the other-component constitutes a remainder which is temporarily stored in a tube controlled relay circuit;

A'further object of the invention is to provide an accumulator arrangement wherein part of the accumulator is responsive to the largest multiple of a base divisor that will go into a to-beaccumulated value as one component ofthat value, and the remainder as theother component of that value is stored in tube operated relay means.

A still further-object of the invention is to provide a differentially movable accumulator wherein the multiples component and the remainder component are fused.

Another object of the invention is to provide a differentially movable'accumulator wherein the largest multiple of a base'divisor of one parent digital value is entered, while theremainder thereof is stored in relaymeans until the storedremalnder is made equal to the base divisor, by the insertion of a second'digital value having aremainder, when the sum of said remainder is then entered into the accumulator;

The present invention is directed towards arecord-controlled accounting machine wherein thespeed at which the record cards are drivenpast the'sensing brushes and the speed at which the sensed amounts are entered in the accumulator exceed considerably those speeds attained by'the electrical accounting systemsof the prior art. The improved results are brought about by coupling a tube controlled relay storage circuit with an accumulator similar to that shown by C. D. Lake in Patent No. 2,328,653 and filed April 1, 1941. The Lake accumulator is modifled by changing the drive shaft gearing such that the'speed thereof is one-half the speed at which the cards are driven past the sensing brushes and by adding an extra lobe to the-- carry cam, which lobe is displaced 180 from the standard lobe. Thus it is-to be'notedthat when the drive shaft searing is bein driven at the speed of-the standard "arrangement, as exemplifiedby'the Lake accumulator, the speed of cards pastthe sensing brushes is double that of the standard arrangement. This difference between the cardspeed and the drive shaft gearing speed permits" a clutch tooth of the accumulator to be present at pulsetime for every even cycle point that is sensed, thus introducing into the accumulating operationa factor of -2 whereby, for every even cycle point of the machine, the accumulator maybe moved one unit.

The electron tube controlled storagerelay circuit is rendered effective whenever an odd amount is sensed in the record card. When a perforation in the-record card representing an oddamount issensed, the largestmultiple of the common base divisor or factor is entered into the differentialelement'of the accumulator while the remainder thereof is stored in the tube controlled relay circuit, with the multiple eomponentand the remainder component being derived by dividing the divisor into the odd" amount sensed. When asecond odd amountis sensed during the next card cyclethe remainder thereof isapplied to a second tube controlled relay circuit which deenergizes the first mentioned relay circuit and causes to be entered into the differential element of accumulator an amount equivalent to the sum of the two remainders, which sum is equal to the base divisor.

Other objects of the invention will be pointed out in the following description and claims and illustrated in' the accompanying drawings, which disclose, by way o1- example, the principle of the Accumulator Referring to Fig. 1, there is shown a drive shaft gear H which is suitably geared to the main driving shaft (not shown). which, in turn, drives the record card feeding mechanism at. the rateof speed such that the speed of the. gear I l is one-half that of the feeding mecha anism or, to express the relationship. in another manner, the gear ll makes. one-half revolution for-each card cycle as shown in the timing diagram of Fig. 3. The gear I l meshes with anddrives the accumulator gear 2 at the speed ratio of 16 to 10. The gear I2 is fixed to the hub (not shown) of the drive clutch ratchet |3 with the gear I2 and the ratchet |3 each rotatably carried by the shaft H. A disk l5 having ten teeth |5a disposed equally about the periphery thereof and a cam edge |5b is rotatably carried by the hub of the ratchet l3. A register wheel l6 having ten peripheral notches |6a which are adapted to cooperate with the upper end of the spring biased detent lever I]. is rotatably carried by the shaft M. The register wheel It has ten rotative positions where each one-half revolution thereof is equal to five adding steps with each step being equal to a digital value of 2. The carry cam I8 is secured to the wheel I6 by a pair of pins |9-|9 only Circuit diagram The circuit diagram of Figs. 2 and 2a shows three denominational orders with the specific circuit arrangementof each order being similar to the tens order, which order is shown in detail. While only three orders are shown, it should be .understood that the invention is not limited to one of which is shown and each of which pro-' jects from wheel l6 through openingsin the disk l5 to a position adjacent the ratchet |3. One of the pins |9.pivotally carries the spring biased clutch dog having integral therewith a clutch tooth 28a. which is made to cooperate with the ratchet I3. The carry cam l8 has a pair of projections |Ba disposed 180 from each other with each projection having a notch |8b adjacent thereto where each projection and notch associated therewith cooperates with the lug 2| in introducing a carry into the next higher order.

The functioning of the wheel I6 is controlled by the start magnet AM and the stop magnet SM in the usual manner as explained in detail in the G. F. Daly Patent No. 2,377,762. Whenever a perforation in a record card, which represents a particular value, is sensed the magnet AM is energized whereby the armature 28 is attracted thereto resulting in the clutch lever 22 being rocked in a counterclockwise direction thereby disengaging the clutch tooth 22a of the lever 22 from the tooth |5a of the disk l5 whereby the disk I5 is made free for rotation. Upon the release of the disk |5- from the clutch lever 22, the clutch dog 20 is rocked into engagement with the ratchet l3 and the wheel I6 is thereby clutched to the ratchet for rotation. After the largest multiple of the base divisor, whichdivisor is equal to a value of 2, has been entered into the wheel Hi, the magnet SM is energized thereby rocking the tooth 22a of the clutch lever into engagement with the tooth |5a, such as shown in Fig. 1, thus preventing further rotation of the disk I5 whereby the clutch dog 20 is disengaged from the ratchet |3 and the wheel I6 is made free of the drive.

While the register wheel |6 is rotating due to the energization of the magnet AM the lug 2|, for the rotative positions of 0, 2, 4 and 6 is riding upon the circular portion of the carry cam l8. After a value of 8 is entered in the wheel Hi, the lug 2| falls into the notch |8b whereby the contact spring 23 engages the carry contact 8T as shown in Fig. 1, thereby conditioning the particular order for a carrying operation to the next higher order. When the wheel l6 advances to or past the 0 value position the projection |8a of the carry cam I8 will raise the contact spring 23 into engagement with the contact NT and will rock the lever 30a into a position to be latched by the latch lever thereby holdingthe spring 23 against the contact IDT whereby a carry from a lower order to a higher order may be effected. After carry has taken place, a stud Ila extending from one side of the drive gear llrocks the latch lever 30 clockwise which, in turn, releases such but is applicable to as many orders as are desired in a particular situation. The circuit diagram of Figs. 2 and 2a shall be described with reference tothe arrangement of the tens order and in conjunction with Fig. 3 and upon an assumption that there is a perforation in the record card for the tens order which represents the digital value 9. The record card I has a plurality of vertical columns with": each column containing the usual index points 09 whereby an amount may be recorded in the card by making the appropriate perforation which, in the particular instant, is a 9 perforation representing the cardinal value 9. i

During the interval the 9 perforation in the record card is being sensed, the normally opened contacts CBI (Fig. 2a), (which close during each digit representing index point of the machine as shown in Fig. 3) close, thereby completing a circuitfrom the high side 2 of the main power sup-' ply to the low side 3 of the .bias power supply system. The completed circuit may be traced from line 2, through line 5, the now closed contact CBI, the connecting line 6, the usual card lever contact 3| (Fig. 2), the conductive roll I, through the sensed 9 hole to the brush 9' and the connecting plug wire 26 (Fig. 2a), through the normally closed carry relay point Cla, the selenium rectifier SI, the resistor RID and the capacitor C| to. the line 3. At the relay point Cla, a second circuit is completed through the normally closed carry relay point Clc, the'rectifier S2, the normally closedrelay point Rla, the resistor R4 and the capacitor C2 to the line 3. The selenium rectifiers SI and S2 are used in the grid feed lines ofthe gas tubes T3 and TI, respectively, for the purpose of preventing back circuits from one tube to another when the respective brush circuits are opened.

As the aforementioned closed circuits are made from the high side 2 to the low side 3, the capacitors Cl and C2 are charged as indicated in of the normally non-conductive gas tubes T3 and 1 TI above their normal firing point but which tubes stillremain non-conductive inasmuch as the potential of their screen grids is below the firing point due tothe normally open cam contacts CB2 and CB4 in the respective screen grid circuits of T3 and Tl. By the proper selection of the magnitudes of the capacitors Cl and C2 and of the respective resistors R20 and R5 associated therewith, the grids of the non-conductive tubes T3 and. TI are maintained above therespective firing points thereof until 8 time such as shown in Fig. 3.

Between the sensing of the 9 and 8 positions in the card the normally open cam controlled contacts CB4 close, as shown in the timing diagram of Fig. 3 (which contact closes just after the subsequent odd digit representin index points '7, 5, 3 and 1 in addition to closing just.

after the 147 index point), thus coupling the cre ner of TI w h the hig si e Z 91 h? main power supply resulting'in the screen grid potential of thetubeTl being driven above-the firing point thereof to render Tl conductive. Upon Tl becoming conductive, the plate of the tube TI is coupled to the highside 2 of the power supply through the relay coil RI, the parallel circuit comprising the-normally closed contact points R2a and the capacitor C4 and the conductor 5. The flow :of current through the coil RI energizes the coil whereby the'contact points Rita and Rio are tripped to the other side while the contact point Rib is closed. At 8 time, the-contacts-CB4 open, thereby removing the potential from the screen grid of TI without effecting the conducting: of TI inasmuch as once a" gas tube is conducting the grids thereof cease to control thefunctioning of the tube until the tube is again made non-conducting. Likewise, at 8 time the cam controlled contacts CB2 close, as shown in the timing diagram of Fig. 3 (which contact closes at the subsequent even digit representing index points 6, 4 and 2m addition to closing at the .14 cycle point), thereby completing the circuit between the high side 2 of the power supply system and the screen grid of the tube T3. Upon the closing of CB2 the screen grid of T3 is driven above the firing point thereof thereby rendering'T3 conducting. Withcurrent flow being initiated'in the tube T3, the accumulator add coil AM, which is in the plate circuit of T3, is energized whereby the clutch dog due to the usual overlap or mechanical lag engages the ratchet I3 during the 7 index point thereby commencing the turning of the wheel l6. After 8 time and prior to 7 time the contacts CB2 return to open circuit thereby driving the plate potential of T3 below the firing point thereof and thus renderin it non-conductive, as shown in the timing diagram of Fig. 3.

The adding wheel will be advanced to the intermediate portion of the "11 cycle point where it is stopped due to .an impulse being applied to, the accumulator stop magnet SM upon the closing, of the cam controlled contacts CB3 at 0 index time, as shown in Fig. 3. At the closing of contacts CB3 the circuit whereby the stop magnet SM is energized may be traced from line 2 to line 5, the magnet SM, the now closed CB3 and line 3.

Thus. it is noted that, at this stage of the assumed problem, the parent cardinal number 9 has been split into two components where one component is registered in the accumulator wheel I 6 and which component is the largest multiple of the common divisor, which is 2 (which is derived from the ratio of the speed of the gearin as pointed out previously), while the other component constitutes the remainder of the parent value and is stored in the relay coil RI due to the energization thereof when T! was made conductive. Thus with the adding wheel l-Bha-vingmoved four units, the lug 2| has moved into-the notch I 8b of the carry cam l8 thereby rocking the contact spring 23 into engagement with the carry contact 8T whereby the-circuit is conditioned for a carry operation. time the contacts CB6 close thereby initiating a carry pulse which is delivered to the accumulator circuit by means of line 2! but is inefiectual inasmuch as the contact point R22) is open due to T2 being non-conductive thus preventing the carry pulse from being applied to the circuit.

Now proceeding with the problem and carrying itzone' step farther, let it be assumed that the next record card to be sensed bears a "15 per.-

foration which value is to be added-to the digital value9 of the previous record card. Upon the sensing of the 1 value in the card and in conjunction with the closing of CB! at the 1 digit representing index point a first complete circuit is made from the line 2, the closed CBI, line 6, the card lever contact 3| (Fig. 2), the conductive roll 1, through the sensed 1 hole to the brush 9 and the connecting plug wire 26 (Fig. 2a) through the normally closed carry relay point Cla, the selenium rectifier SI, the resistor RH! and the capacitor CI to the line 3 whereby the capacitor Cl is charged thereby increasing the grid potential of T3 above the firing potential thereof. As a result of CB2 being open at this 1 time in the cycle (see Fig. 3) and thus preventing the application of a potential to the screen grid of T3, the tube T3 remains non-conductive and the capacitor Cl discharges through the resistor R2. With the closing of CBI a second circuit is also completed from the line 2 through to the line 3 by means of the closed contact CBI, line 6, the conductive roller I, through the l perforation to the brush 9, the line 26, the contact Clc, the rectifier S2, the now shifted contact Rla (due to TI being conductive), the resistor R"! and the capacitor C3, whereby the capacitor C3 is charged, resulting in the grid potential of thenon-conductive gas tube T2 being raised above the firing potential thereof.

At one-half after 1*the cam controlled contacts CB4 close resulting in a potential being applied to the screen grid of the non-conductive tube T2 which drives the screen above the firing point thereof and renders T2 conductive. Upon T2 becoming conductive, a circuit is completed between the high 2 and low 4 sides of the power supply source through the normally closed contacts CB5 (which remain closed until the 15 index point), the coil R2 and the now conducting T2 whereby the coil R2 is energized resulting in the contact point R2a, which is in the plate circuit of TI, being opened while the contact point R2b is closed. With the opening of contact point R211 the tube TI is rendered non -conducting thereby deenergizing the coil RI and resulting in the contact points Rla, Rlb and Rio being returned to the normal position thereof.

At 14 time the carry cantacts C6 close, thus making the carry circuit whereby a carry pulse is initiated and the coil AC is energized. The carry pulse is applied to the control grid of the non-conductive tube T3 through line 21, the now closed contact point R22), the shifted contact point Clb, the rectifier SI and the resistor RIO thus driving the control grid of T3 above the firing point thereof. Simultaneous with the initiation of the carry pulse, the contacts CB2 are closed whereby a potential is applied to the screen grid of T3 which raises the potential thereof above the firing point thus rendering T3 conductive. With T3 being made conductive, the start magnet AM which is in the plate circuit of T3 is energized thus producing rotation of the adding Wheel I6 which commences, due to the over-lap between the clutch dog 20 and the ratchet l3, during the 15 time. Likewise, during the initiation of the carry pulse a carrying operation will take place to the next higher order due to the condition of the R217 contact and the 8T carry contact and which operation shall be described subsequently. The tube T2 is restored to a non-conductive status when the contacts CB4 and CB5 open respectively during the 14 and 15."index .point. At 16? time aknock off.

impulse is delivered to the coil SM by the closing of CB3 whereby the rotation of the wheel I6 is stopped after one unit, which is equivalent to a digital value of 2, has been entered therein. Thus it is to be noted that the remainder component of the preceding cycle as represented by a di ital value of 1, and the cardinal number 1 which was sensed in a subsequent cycle were stored together temporarily in relays and then transferred to the accumulator at carry time to be entered therein.

Carry operation Let it be assumed, for example, that the register wheel for the units and tens order are both in the 8 value position with an odd count stored in the relay circuit RI of each order. With the wheels in the 8 value position, the contact spring 23 of each order is in engagement with the carry contact 8T. Likewise, with the relay circuit RI energized, the contacts RI a, Rib and Rio have all been tripped from the normal position thereof. Now, when a value of l in the units order is sensed in a subsequent record card, the tube T2 of the units order is rendered conductive and TI of the units order is made non-conductive whereby the sensed value is stored in the relay R2 as pointed out previously.

The carry operation is initiated in the 14 cycle point by the closing of the contacts CB6 whereby a source of potential is applied to the carry circuit resulting in the energization of the coil AC which causes the carry relay points CH1 and CIc to be tripped to the respective points thereof CIb and Old. During this operation, a carry pulse is applied from the line 2 through the carry circuit and coil AC, line 21, the now closed contacts R217 and RI!) to the grid of the nonconductive tube T3 thereby driving the grid above the firing point potential. Simultaneous with the application of the pulse to the grid of T3, the contacts CB2 close thereby driving the screen grid of T3 above the firing potential thereof and resulting in T3 being made conductive. Upon being made conductive the coil AM is energized thereby permitting the register wheel to move to the position as pointed out previously. Inasmuch as the carry contact 8T of the units order is in a closed position the carry operation may be carried further to the next order in succession, which is the tens order. In this instance the carry pulse is applied from line 21, the closed R22) of the units order, the BT contact of the units order, the line 28 whichfeeds the pulse from the units order to the tens order, the shifted Cld of the tens order, the rectifier S2, the now shifted Ria to the grid of the non-conductive tube T2 which is subsequently rendered conductive and non-conductive before the end of the card cycle. The carry over from the units order is also applied through the contact Rib of the tens order, which is now closed due to the tube T2 associated therewith being conductive, contact Cib of the tens order, to the grid of the tube T3 of the tens order which is rendered conductive in the manner pointed out previously thereby energizing the magnet AM and permitting the wheel to shift from the "8 position to the 0 position. Inasmuch as the carry operation moves the register wheel of the tens order from the 8 to the 0 position, unity must be carried further to the next denominational order in succession which is the hundreds order. In the hundreds order the contacts Rib and R2b are both open while the tubes TI, T2 and T3 are non-conductive. The carry .over from the tens order is applied to the hundreds order by way of the closed 8T contact of the tens order, the line 28 connecting the tens and hundreds order, the shifted contact Cld, the rectifier S2, the contact Bid to the grid of the non-conductive tube TI. At one-half after the I4 cycle point the contact CB4 closes rendering TI of the hundreds order conductive and resulting in the storing of the unity carry over in the relay RI associated therewith.

Another problem which demonstrates the operability of the accumulator centers around the adding of two even numbers which are sensed from two separate cards. This problem will be described with reference to the arrangement of the tens order and it shall be initially assumed that there has been entered in the register wheel I6 of the tens order a value of 6 and that a subsequent record card contain an 8 perforation in the tens order. During the interval the 8 perforation in the record card is being sensed, the normally opened contacts CBI and CB2 close, as shown in Fig. 3, whereby the tube T3 is rendered conductive in the manner as referred to previously. Likewise, as pointed out previously, upon the sensing of the 8 perforation in the card the capacitor C2 of the tube TI is charged thereby driving the grid potential thereof above the firing point but this charge drains off before the contacts CB4 apply a potential to the screen grid of TI thus preventing the tube TI from being rendered conduct- With the tube T3 being made conductive the start magnet AM, which is in the plate circuit of T3, is energized whereby the clutch dog 20 engages the ratchet I3 and the wheel I6.

While the wheel I6 is rotating and adding the value 8 to the already entered value of 6, the carry cam I8 is likewise moving such that when the wheel passes the 0 value on 9 the projection I3a of the carry cam cams the lug 2 I in an upward direction so as to force the spring contact 23 into engagement with the MIT contact. After the wheel has moved 2 units, which is equivalent to a value of 4, past the 0 value, the contacts CB3 close at 0 index time thu energizing the sto magnet SM whereby the wheel I6 is stopped.

At the 14 time the contacts CB6 close thus completing the carry circuit whereby a carry pulse is initiated and the coil AC is energized. The carry pulse is applied to the tens order through the line 21 where it is coupled to the IOT contact through the medium of the connecting line 32. From the IOT contact the carry pulse is applied to the hundreds order by the line 28 where the circuit may be traced through the elements of the hundreds order comprising the closed contact point Cid, the rectifier $2, the contact point Ria to the capacitor C2 and finally line 3. Upon the application of the pulse to C2, 2. charge is introduced therein which drives the grid of TI above the firing potential thereof. Simultaneous with the release of the carry pulse, the contacts CB5 close whereby a potential, is applied to the screen grid of TI resulting in the igniting of TI and energizing the coil RI whereby the odd count, resulting from the addition of the values 6 and 8, is stored therein indefinitely.

At 16 time one of the studs IIa disposed upon the gear II rocks the latch lever 30 (see Fig. 3) which, in turn, releases the lever 30a and enables the contact spring 23 to rock itself and the lever 30a back to the normal position thereof.

' Readout means During the'aforementioned adding operation, the brush of'the emitter 24, which. is of conventional construction, is rotating constantly at a speedwhich is equal to the speed of the card feeding mechanism and which is twice the speed at which the gear H is being driven. Whenever a total printing is desired the switch.33 is closed which thereby couples a source of potential 34 to the emitter 24- such that as the brush of the emitter 24 rotates it successively connects the contacts Rlc, through the medium of the lines 25, to the potential 34 thus impressing digital impul e n th prin m ne P at the ap pria e tim f r .the n y therein of corresponding digits in the accumulator.

jIhenumberedsegments of the emitter 24 are coupled to the corresponding numbered contact points Rlc. The contact points Ric are paired with each dd number d conta t point and the adjacent 'lowernumbered point being paired with each pair of p ints bein selectiv ly co ple through the corresponding contacts 35 to the segment of the accumulator commutator ,29 which represents a value equal to the lower numbered contact point of each pair of points. The selecting ofthe contact points Ric is controlled by the relay coil RI which upon becoming energized, due to the tube Tl being made conducting, trips the movable contact 35 between each pair of contact points from the even numbered points, which isthe normal position of the contact 35, to the odd numbered points.

Now assume for example that a total printing is desired after a group of cards has been sensed and that there has been entered in the accumulator a value of9. Under this assumption the brush of the counter commutator will be in contact with the 8 segment thereof while the coilRl will be in an energized state due to the storage therein of the odd count in a manner as pointed out previously. With the coil RI in an energized state the contacts Ric are tripped from the even numbered points to the odd numbered points. The accumulator is now in condition for a printing operation which may be brought-about through the closing of the switch 33. When the switch 33 is closed a'complete circuit forprinting will 'be made from'the source of potential 34, the closed switch 33, the brush of the emitter 24, the 9 segmentvof the emitter, line :25, the 9 contact point of Rio to the contact .5 associated therewith, the 8 segment of the commutator 29, the brush of the commutator in contact with the 8 segment, and finally from the brush to the print magnet PM. With the energization of the print magnet PM, the printing operation may be effected in a well known manner, as disclosed for example, in U. S. Patent No. 2,377,762 where the recording magnet RM (Fig. 11c of the patent) operates similarly to applicants magnet PM.

While the invention is described with reference to a printing operation it should be noted that the readout may be used for other purposes such as is well known in the art.

Resetting of the accumulator may be effected in a known manner, such as for example by adding thereto the tens complement of the total standing therein which will advance the wheels to represent zero in all orders.

While there have been shown and described and pointed out the fundamental novel features of the invention as applied to a preferred embodiment, it will be understood that various omissionsand substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. In a cyclically operable machine of the class described-having means for feeding record cards in which designations represent the digits of an amount in cardinal notation form, means for sensing said record cards, accumulator-means having a plurality of denominationally ordered accumulating elements, carrymeans for coupling said elements, electron tube controlled storage means operably connected to each of said elements, means controlled by said sensing means for -;entering into each of said elements, the largestmultiple of a common divisor where said multiple is the result of dividing said divisor intosaid sensed amounts, further means controlled by said sensing means for entering into said storage means the remainder component of said amounts, said remainder being retained in said storage means, means effective upon entry of a second remainder component in said storage means for entering the sum of said remainders as a :unit in said accumulating elements, the sum of saidremainders being equal to said common divisor.

2. In a cyclically operable machine of the class described, means for feeding record cards bearing designations of the digits of an amount in cardinal notation form, means sensing said cards in succession, accumulating means including a plurality of denominationally ordered accumulator elements, carry means operatively connecting said elements, means for entering in said elements a component part of said sensed digits, electron tube controlled storage means operativelyconnected to each of said elements, means for entering in each of said storage means the remainder component of said sensed digits, said component part and said remainder component being derived by dividing said digits by a common base divisor.

3. In a cyclically operable machine of the class described, a plurality of record cards each having a plurality of denominationally ordered columns bearing amounts designated therein in cardinal notation form, means sensing each of said columns for the digital value entered therein, each of saidsensing means having accumulator means operablywcoupledthereto, each of said accumulator means having an accumulating element and an electron tube relay controlled storage means coupled thereto, means for entering in said elements the largest multiple of a base divisor as one component of said digital value, means for entering in said storage means the remainder component of said digital value, said largest multiple and said remainder being derived from said digital value by dividing said digital value by said divisor, readout means coupled to each of said accumulators, said readout means constructed and arranged to read out the totals only of said columns.

4. In combination, an accumulator having an accumulating element adapted to accumulate a first component of a digital value in cardinal notation form, electron tube relay controlled means adapted to store therein a second component of said value, said controlled means being operably coupled to said accumulating element,

said first and second components being derived by dividing said digital value by a common base divisor, said first component being the largest multiple of said divisor while said second component constitutes a remainder of said divisional operation, said accumulator having a readout commutator coupled thereto, said readout commutator causing to be read out the sum of said first and second components.

5. In combination, an accumulator having an accumulating difierential element, first, second and third electron discharge devices, said devices normally being non-conductive, said element being controlled by said first device, a first relay means being controlled by said second device, a second relay means being controlled by said third device, a first means energizing said first device thereby activating said element whereby the largest multiple of a base divisor is entered in said element, a second means rendering said second device conductive thereby energizing said first relay means whereby a remainder component is stored therein, said largest multiple and said remainder being derived by dividing said divisor into a first digital value, means rendering said third device conductive thereby energizing said second relay means whereby a remainder from a second digital value is stored therein, said first relay means being made inactive upon said second relay means becoming active, means for entering in said element the sum of said remainders, and means for rendering inactive said second relay means.

6. A cyclically operable machine of the class described comprising record cards bearing designations of the digits of an amount, means suc cessively sensing said cards for said digits, means for deriving from each of said digits a first and second component, said first and second components being obtained by dividing each of said digits by a common base divisor, said first component constituting the largest multiple of said division while said second component constitutes a remainder, an accumulator means having an accumulating element and a relay storage means, said storage means coupled to said element, said largest multiple being entered in said element, said remainder being stored in said storage means, a readout commutator operably coupled to said accumulator, said commutator adapted to read out the sum of said first and second components.

v'7. A cyclically operable machine of the class described comprising a differentially movable element having five numbered rotative positions of 0, 2, 4, 6 and 8, whereby the multiples component 12 i of a sensed digital value is entered therein, electron tube controlled relay means for storing the remainder component of said value, said multiples and remainder components being derived by dividing said value by a common base divisor, said relay means being associated with said element, means operably coupled to said relay means for modifying the significance of said positions whereby said positions will be adapted to read out a value one greater than said position,

8. In a machine of the class described having means for cyclically feeding record cards in which designations represent the digits of an amount in cardinal notation form, said card feed cycle having an entry period and a carry period, means for sensing said record cards, a movable adding element to receive the largest multiple component of a sensed digital value, a first electron tube controlled relay means for receiving the remainder component of said value, said element and first relay receiving said components during said entry period, a second electron tube controlled relay means operably coupled to said first means, said second relay being energized during the en-- try period of a subsequent sensed value having a remainder component if said first relay is energized, means controlled by said second relay for entering the sum of said remainders into the adding element during the carry period.

9. A movable accumulating wheel having five rotative positions of 0, 2, 4, 6 and 8 for entering therein the largest multiple of two of a sensed digital value, a first relay means for storing the odd remainder component of said value, said first relay means being operably associated with said element, a second relay means operably coupled to said first relay means, said second relay means adapted to store the odd remainder component of a subsequent sensed value, means for advancing said wheel one position during the carry period concurrently with the tens carry to the higher order when said second relay has stored therein said subsequent odd remainder.

VICTOR O. WILKERSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,344,885 Kozma et al Mar. 21, 1944 2,375,332 Torkelson May 8, 1945 2,396,229 Blakely Mar. l2, 1946 2,502,917 Beattie Apr. 4, 1950 

